There are many factors by which the rank varies every year n every college. There are many college in Karnataka such as:

1. Manipal institute of technology which is known as one of the best colleges in Karnataka and you need to score minimum of 1200 rank it means you should score 140+ marks to get into CS in MIT.

2. National institute of technology surathkal Karnataka is also an engineering college whose closing rank in 2019 is 2150+.

3. MSRIT in Bangalore is also needed a score 145+ to get seat in CS department. These are some of the college's in Karnataka but as said or known the cutoff varies every year. So you must try hard to get into these colleges.

Hope you found this information useful. All the best